.process-nav {
    overflow: hidden;
    margin: 0 0 10px;
    padding: 0 0 26px;
    width: 800px;
    height: 0;
}
.process-nav li{
    position: relative;
    float: left;
    width: 200px;
    height: 26px;
    background: #E4E4E4;  
    text-align: center;
    line-height: 26px;
    font-weight: 700;
    font-size: 14px;
}
.process-nav li b{
    position: absolute;
    right: -13px;
    top: 0;
    width: 18px;
    height: 26px;
    background: url(../../../images/common/tip_bg.png) 0 0 no-repeat;
}
.process-nav .on{
    background: #3B7CD0; 
    color: #FFF;
}
.process-nav .on b{
    background-position: 0 -30px;
}
.process-nav .last b{
    display: none;
}
.process-nav .step1{
    z-index: 4;
}
.process-nav .step2{
    z-index: 3;
}
.process-nav .step3{
    z-index: 2;
}
.process-nav .step4{
    z-index: 1;
}